Coupling.



B. T. GREENFIELD.

COUPLING.

APPLIOATION FILED DEG.10,190G.

Patented Apr. 26, 1910.

EDWIN 'r. GREENFIE'LD, or KIAni'EsH'A, saw Yam.

- cournmo.

Specification of Letters fatent.

Patented Aiir. 2e, 19'10.

Application filed December 10, 1906. Serial Nb. 347,140.

To all whom it may concern:

, Be it known that I EDWIN T. GREENFIELD, a citizen of ,the United States, residing at Kiamesha, in the county of Sullivan, State of New York, haveinvented certain'new and useful Improvements in Couplers, of which the following is a specification.

This invention relates to couplers for connecting the-end of a length of hose to a hydrant, engine, compressor or to the end of another length of hose.

The object of the invention is to effect certain improvements in the constructon of couplers for this and similar uses to the end that a con ler is rovided whereby a connection can e ra i ly 'made which will Withstand considerab e pressure.

My improved coupler maybe used with hose of widely different types but it is particularly ada ted for use with that type knownas reenfield armored/hose consisting of a flexible tube of rubber and fabric and an armoring thereon of spirallyformed metallic strip.

An embodiment of the invention is illustrated in the accompanying drawings in which- Figure 1 is an elevation of the coupler, secured on the-end of a length of hose, Fig. 2 is a longitudinal section of the same and Fig. 3 is an end view of the coupler showing 'of hose is preferred, other forms may be used with the coupler as well.

- The; con ler consists of a split sleeve .B, a locking s eeve C and a connecting member D. The sleeve B is interiorly threaded to provlde a sp1 ral projection 6 corresponding in size and pltch to the spiral depression on the outer surface,of the hose. On the exterior of the 'sleeveflattened sides 6' are prov1ded ad acent to one end forming a nut and ad acent to the other end, the exterior of the/sleeve is threaded at 6 The sleeve is split as indicated at b. The locking member D is of tubular is somewhat greater than the diameter of the opening through the wall 0 of the sleeve C. From the flange d to the other end of member D, the outer wall thereof is tapered off so that the exterior diameter of member D continually decreases from,fiange d to the end (:3 thereof.

The manner inwhich the coupling thus constructed is used will now'be explained.

The s lit sleeve B is first screwed on the endof t e hose A until its end alines with the end of the hose and the small end (1 of the connecting member D is inserted in the end of the hose.'. The lockin sleeve 0. is then passed over the end of t e member D until the threads 0' thereon engage the threads I) ofsplit sleeve B and is screwed up thereon. As the threads enga e, the flange a engages the flange d an thereafter, screwing up the sleeve O on sleeve B forces the small end d of the connecting member D into the end of the hose A. On account of the inclination of the outer wall of the end (i of the member D, forcing the end into the hose expands the latter'somewhat, as shown in Fig. 2, and the pressure of the armoring a onthe interior, of spl t sleeve B causes the latter to expand. This 1s continued until the end 01 of member D is forced a considerable distance into the hose, expanding the hose and the sleeve B, and until the sleeve is forced mto hard engagement with the interior walls of the sleeve C. v

Great force can be appliedto-turn sleeve 0 relatively to sleeve 'B b employing wrenches gripping the nuts ormed by the flattened wal s b and 0. When theparts have been brought to their final positions, the end of the hose and the sleeve B are squeezed between the part d and sleeve C so tightly that turnin of sleeve B on the armoring a is preclu ed, and the pressure between the end (2 of the member D and the tube a of the hose is so great as to'efiectually prevent escape of a fluid between them even though it be under considerable pressure.

Having described my invention, What I claim as new therein and desire to secure by Letters Patent of the United States, is:

e The combination of a hose consisting of a flexible tube and an armoring thereon .formed of a series of metallic, interlocking,

relatively movable spirals, and a coupler comprising an eXteriorly-threaded sleeve on the hose split throughout its length, a connecting member having a circumferential flange and an elongated tapering end, and a second sleeve on said split sleeve interiorlythreaded to coact With the exteriorlythreaded split sleeve and having a flange coacting with the flange on said connecting member, said sleeves being adapted to be turned relatively to move the connecting member axially of the hose and force the tapered end of the connecting member into the end of the hose to spread the same and the split sleeve thereon and grip them between said tapered end and said outer sleeve, substantially as described. I

This s ecification signed and witnessed this 7th ay of December, 1906.

EDWIN T. GREENFIELDF 

